Isn't the Staccato a hi cappa clone? If so have a look at the amomax holster. I've got a couple and while they do need a little work to fit properly (5 minutes in boiling water) they're great kit and quite cheap too
A Polymer constructed retention holster for TM/WE/KJW/KWA Hi-Capa series Gas Blowback Pistols, which will attach to a Belt or to MOLLE (using a separately sourced MOLLE adapter) and hold your pistol tight until you press the release button.
Airsoft answer..... universal soft holster fits all the things...
Guy who builds hicapas into silly money pits answer.... buy the real steel holster....
My current answer, decide streamlight or surefire buy the blackhawk "gunbucket"/omnivore holster for the relevant light. Relax in the knowledge that nigh on every pistol that can mount either a tlr or an x series light will be positively retained and you canhot swap just by moving the light.